Redpanda

This is how to connect to Redpanda from Zilla. The examples use the below Environment variables.

Environment variable	Description
SASL_USERNAME	The SASL username for Redpanda
SASL_PASSWORD	The SASL password for Redpanda
KAFKA_BOOTSTRAP_SERVER	Redpanda Kafka Bootstrap server endpoint

Before we proceed further let's use the below command to verify connectivity to your Kafka.

kcat -b $KAFKA_BOOTSTRAP_SERVER \
-X security.protocol=sasl_ssl -X sasl.mechanisms=PLAIN \
-X sasl.username=$SASL_USERNAME -X sasl.password=$SASL_PASSWORD \
-L

Configure Zilla

With working credentials you can connect with Zilla by adding these bindings.

zilla.yaml

bindings:
...
  south_kafka_client:
    type: kafka
    kind: client
    options:
      servers:
        - ${{env.KAFKA_BOOTSTRAP_SERVER}}
      sasl:
        mechanism: scram-sha-256
        username: ${{env.SASL_USERNAME}}
        password: ${{env.SASL_PASSWORD}}
    exit: south_tls_client
  south_tls_client:
    type: tls
    kind: client
    exit: south_tcp_client
  south_tcp_client:
    type: tcp
    kind: client

NOTE

SNI adds the domain name to the TLS handshake process so that the Zilla process reaches the right domain name and receives the correct SSL certificate.

To test the above config you Download and run the Zilla http.redpanda.sasl.scram cookbook using this install script. It will start Zilla and Kafka.

wget -qO- https://raw.githubusercontent.com/aklivity/zilla-examples/main/startup.sh | sh -s -- http.redpanda.sasl.scram

Note

Alternatively, download http.redpanda.sasl.scram and follow the README yourself.